General Lighting and Receptacle Loads
Small-Appliances Branch Circuits
Laundry Branch Circuit(s)
Connected Load
First 3000 VA
Succeding 3000 VA to 120000 VA
Excess of 120,000 VA
Demand Factor
Quantity
42
5
2
Design Exercise 2.1 (6 Unit) Multifamily Dwelling Unit
Voltage
Ampere Voltage Ampere/Quantity
230
4.383
24
230
32.609
1500
230
13.043
1500
3000
66048
0
UNITS
6
6
6
Total Voltage Ampere
6048
45000
18000
69048
3000
23116.8
0
26116.8
VA
VA
VA
VA
VA
VA
VA
VA
6
6
6
6
6
VA
VA
VA
VA
VA
VA
VA
VA
100%
35%
25%
Water Heater
Disposer
Compactor
Diswasher
Three Attic Fans
Connected Load
Demand Factor
Clothes Dryer
1
1
1
1
3
230
230
230
230
230
Fastened Appliances In Place
4000
8
230
8
230
9
230
12
2760
75%
1
230
6000
6
24000
11040
11040
12420
16560
75060
5629500%
27000
Range
Oven 1
Cooker Unit
1
1
1
230
230
230
0
8000
9000
0
6
6
0
48000
54000
VA
VA
VA
102000
VA
0
20640
21000
41,640
VA
VA
VA
VA
0
VA
Cooking Appliances
Connected Load
A
B
C
Demand Load
Air Handler
0
1
1
0%
43%
100
0
8000
21000
1
Cooling and Heating Appliances
230
0
0
6
6
AC Compressor
Compressor Fan
Connected Load
Electric Heater
Air Handler
Connected Load
Demand Load
Largest Motor
Total Demand Load
System Voltage
Service Rating
No. of Parallel Conductors
Adjustment Factor (3.10.2.6(B)(3)(a)
Minimum Ampacity per Conductor
Copper Conductor Size at 75°C
Total Neutral Conductor
Neutral Conductor calculated
Neutral Conductor size
GEC
EGC
1
1
230
230
18
4
4140
920
6
6
1
1
230
230
5
15000
1150
6
6
25%
400
1840
Phase
3
Full Load Current
24840
16560
41400
90000
6900
96900
96900
460
24841180%
359
400
1
100%
400
250
22781980.0%
329
250
50
50
VA
VA
VA
VA
VA
VA
VA
VA
VA
A
A
SET
A
mm² CU
mm² CU
mm² CU
mm² CU